Valve flow coefficient KV per IEC 60534-2-1, with physical pressure drop from Bernoulli equation. Formula: KV = Q·√((ρ/1000)/△P), △P = ξ·V²·ρ/(2·10⁵)
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KV formula per international standard for control valves.
Physical △P = ξ·V²·ρ/2 from fluid mechanics, not back-solved.
Water at 1000 kg/m³ preset; adjustable for any medium.
Uses ξ from Valve Design Manual P30 (default 1.3).
Book's △P=26 bar was a 1000× unit error; corrected to 0.026 bar.
Flow area A = π·DN²/4 computed from nominal diameter.
Input nominal diameter DN (m), e.g. 0.1 for DN100.
Input medium velocity V (m/s).
Specify density ρ (kg/m³), default 1000 for water.
Get flow coefficient and physical pressure drop.
Input allowable tensile stress [σL] for body material.
Specify corrosion allowance C based on service conditions.
Compare actual body thickness SB to calculated S'B.
Enter your design parameters and get instant verification results.
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